Strategy question
For a marketplace, how would you decide whether to have two different apps for buyers & sellers or only a single app?
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What this question tests
Whether you can reason through a real product architecture tradeoff using both sides' distinct needs and the cost of fragmentation.
How to approach it
- Clarify the marketplace type, since a food delivery app like Swiggy has very different buyer and seller behaviors than something like Airbnb.
- List what differs between buyers and sellers: sellers need dashboards, inventory, and order management, buyers need discovery and browsing.
- Weigh the case for separate apps: each side gets a purpose-built, less cluttered experience tailored to very different jobs to be done.
- Weigh the case for one app: lower engineering and marketing overhead, and easier cross-side awareness, like a buyer becoming a seller.
- Decide based on how different the two workflows actually are, recommending separate apps when seller tooling is complex and daily, like Swiggy's restaurant partners.
- Define a success metric for the decision, such as seller task completion time, with a guardrail on buyer confusion if a single app is chosen.
What a strong answer includes
- Grounds the recommendation in how different the two workflows genuinely are, not a one-size-fits-all rule for all marketplaces.
- Notes that complex, daily-use seller tooling, like a restaurant order dashboard, strongly favors a separate app.
- Weighs the real cost of fragmentation, doubled engineering and marketing effort, against the benefit of a focused experience.
- Applies the decision to a specific marketplace example rather than answering only in the abstract.
Common mistakes
- Giving a generic answer without applying it to how different this marketplace's buyer and seller workflows actually are.
- Ignoring the real engineering and marketing cost of maintaining two separate apps.
Likely follow-up questions
- What would make you merge two separate apps back into one later?
- How would you handle a user who is both a buyer and a seller?
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Learn the skill behind it
Chapters of the AI PM course that teach what this question tests.
- Chapter 4: Discovery and strategy for AI products
- Chapter 9: Prove it paid off: outcomes, economics, and pricing
- Chapter 14: Get the job: the AI PM interview loop